Skarn type tungsten ore deposit is one of the main types of tungsten deposits in China. These deposits mainly produce scheelite, and they are generally large deposits. 

Tungsten concentrate has various types, such as greisen type, quartz vein type and porphyry type. The most famous one is quartz vein type tungsten concentrate deposit, it distributes in south of Jiangxi, north of Canton and east of Hunan. The resource is concentrated and full of rich ore, has been the main exploration of tungsten in China.

Tungsten ore grade is tungsten trioxide (WO3) content in the exploited ore, it can be expressed by percentage of mass fraction. Usually the high grade one is called rich ore, low grade one is called poor ore.

Doped tungsten powder is tungsten powder doped with dopant such as Al2O3, KCl, SiO2, it is raw material for producing tungsten products such as tungsten rod, tungsten wire, tungsten alloy and so on. It is mainly used to produce doped tungsten wire.

Working function means electrons escape from nucleus and the minimum energy needed to escape from surface of material. Generally speaking, electrons escape from metal need to add electron energy so as to make it active. 

Famous tungsten mine – Kazakhstan Akshatau Tungsten Molybdenum Mine locates 150 miles away from northwest of Balkhash in Central Asiam altitude is about 740m, explored mine can be divided into three categories, 2740 thousand tons WO3 with 0.7% grade, 65 million tons WO3 with grade 0.2%, 30 million tons of WO3 with grade 0.05%. 

Famous tungsten mine - Australia Tasmania King Island Scheelite is in the northwest coast of Tasmania, which is in the south of Australia, average altitude is 210 meters. It has exploiting history of over 100 years. At present, the exploiting tungsten ore reserve is 3100 thousand tons, ore grade is 0.7%, WO3 reserve is 22 million tons.

Tungsten is a kind of important metal, it is irreplaceable resource in modern industry and national defense construction. From original ore to various industrial products, tungsten is processed under four steps: raw material exploration, tungsten concentrate degradation, chemical transformation and produced into tungsten metal products.

Tungsten reserve of Russia is 250 thousand tons, ranks the third place in the world. Tungsten is mainly locates in Siberia and far east region, the exploited tungsten are almost original tungsten deposit. 

Famous tungsten mine - Mittersill Scheelite Mine in Austria is the biggest tungsten scheelite mine in Europe, it locates in the Alps, 3 miles in the southwest of Vienna, yearly mining amount is 400 thousand tons, yearly produced tungsten amount is 1800 tons. The mine is 10 miles away from the north of Mittersill town, that’s how it name comes from.